摘要
小波变换具有良好的时频局部化特性,可以同时提取信号的时频特性,是分析电能质量问题的有力工具。文中介绍了利用小波变换分析配电网中常见的因开关动作、变压器磁饱和及电力电子装置引起的电能质量扰动问题。经仿真分析,验证了小波变换能够更好地提取扰动的特征信息,从而为电能质量问题的检测、评估、分类以及治理提供了依据。
Wavelet transform (WT) possesses good localized time-frequency characteristics. Using WT the time-frequency characteristics of signals can be extracted simultaneously. Here the power quality disturbances caused by the switching of circuit breakers, the saturation of transformers and the power electronic devices are analyzed by WT. It is verified by simulation analysis that the characteristic information of disturbances can be well extracted by WT. Therefore, the basis for detecting, evaluation, classification of harmonics and the improvement of power quality is provided.
出处
《电网技术》
EI
CSCD
北大核心
2003年第7期60-65,共6页
Power System Technology
